67 



similar also to a pathogenic bacillus found in broncho pneu- 

 monia in cattle and an infectious pneumonia in sheep. See 

 Report on Swine Plague by T. Smith, U. S. Bureau of Ani- 

 mal Industry, 1891. 



Micrococcus lanceolatus is the specific organism of 

 lobar pneumonia in man. It is found in the pneumonic lung 

 tissue and also in the saliva of a certain number of people. 

 For the history and long synonomy of this organism see 

 article by Prof. Welch in the Johns Hopkins Hospital Bulle- 

 tin, Vol. Ill, p. 125. This organism resembles in many of 

 its properties very closely that of swine plague. In study- 

 ing the two species together there will be good opportunity 

 of comparing them and detecting the differences and simi- 

 larities existing between them. 



§110. General directions. From the cultures furnished, 

 inoculate a set of media, and make a hanging drop and a 

 cover-glass preparation from each. 



Examine carefully the hanging drop preparations and de- 

 scribe the appearance of the bacteria. 



Stain the cover-glass preparation with an aqueous .solution 

 of methyl-violet, and carefully examine and describe the bac- 

 teria. Measure a few of them with the filar micrometer and 

 make a drawing of a few organisms magnified 1000 diame- 

 ters. 



Read as far as possible the articles cited on these organ- 

 isms. 



EXERCISE XXXVI. ' 



BACTERIUM (BACILLUS) SEPTICAEMAE HEMORRHAGICAE 

 AND MICROCOCCUS LANCEOLATUS (continued.) 



§ III. General directions. Carefully examine and de- 

 scribe the cultures made in Exercise XXXV. 



Examine the agar and bouillon cultures microscopically in 

 both the living condition and in cover-glass preparations 



